Conceptual Design of a 5 T 200 mm 1 T/s Ramping NbTi Synchrotron Magnet for Cancer Treatment

Jeonghwan Park, Garam Hahn, Uijong Bong, Soun P. Kwon, Hyunjung Lee, Mincheol Cho, Jaemin Kim, Yong Chu, Moon Youn Jung, Ki Jin Han, Seungyong Hahn

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Recently, a collaborative research to develop an all-superconducting synchrotron system for cancer treatment was embarked by a team led by Electronics and Telecommunications Research Institute in Korea. The system requires a 5 T dipole magnet with a uniform field region in cylindrical shape of 130 mm in diameter and 3000 mm in length, and operates at a ramping rate of 1 T/s. As the first step of the project, this paper presents a conceptual design of the magnet that consists of six single-layer cosine windings made of the NbTi Rutherford cable. Key design results include: (1) spatial field uniformity, \Delta B/B < 2\times 10^{-4} within a target space of |r|< 65 mm; (2) total ac loss of the entire coils, 297 J per cycle for a normal operation of 1 T \rightarrow 5 T \rightarrow 1 T at the 1 T/s ramping rate; (3) ac-loss-oriented cryogenic load of 23 W; (4) peak temperature of 4.9 K within the magnet during the consecutive normal operation; (5) enthalpy margin of 2.1 mJ/cm^3 with the current sharing temperature of 5.65 K; and (6) adiabatic temperature rise of 87 K upon a quench.

Original languageEnglish
Article number8678793
JournalIEEE Transactions on Applied Superconductivity
Volume29
Issue number5
DOIs
StatePublished - Aug 2019

Keywords

  • Cancer treatment
  • fast ramping
  • superconducting dipole magnet
  • synchrotron

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